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https://nzz.ch

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
1
PASS
9
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
28
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

10.95 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

17.16 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

1.73 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.062

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

10.95 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

19.89 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
9 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
2.8 MB transferred, 117 requests
FIX
2.8 MB transferred, 117 requests
Warning::
Page weighs 8.3 MB (2.8 MB transferred)
Warning::
JavaScript is 1.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.7 MB
Warning::
117 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.58 g CO2 per page load
2.8 MB / 2.4 MB budget
2.8 MB transferred
117 requests
0.58 g CO2 per page load
JavaScript 1.7 MiB 63%
Images 439.6 KiB 15%
Other 301.5 KiB 11%
HTML 168.4 KiB 6%
Fonts 80.4 KiB 3%
CSS 35.8 KiB 1%
Other 24.5 KiB 1%
Other 9.6 KiB 0%
Other 5.6 KiB 0%
Other 306 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.8 MiB of 2.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
6612ms total JS execution
FIX
6612ms total JS execution
Warning::
https://nzz-assets.static-nzz.ch/production/web/14...: 2059ms CPU time
Warning::
Unattributable: 779ms CPU time
Warning::
https://www.nzz.ch/: 753ms CPU time
Warning::
https://adnz.co/header.js?adTagId=8: 454ms CPU time
Warning::
blob:https://www.nzz.ch/ab02a285-66d4-4f7e-ab09-3f...: 409ms CPU time
Warning::
Third-party scripts: 6612ms (100% of total)

Main Thread Breakdown

Script Evaluation 56% Other 15% Style & Layout 12% Parse HTML & CSS 8% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/index-Dz6CZgSb.js2059ms1341ms2ms3rd
Unattributable779ms52ms0ms3rd
https://www.nzz.ch/753ms50ms41ms3rd
https://adnz.co/header.js?adTagId=8454ms294ms103ms3rd
blob:https://www.nzz.ch/ab02a285-66d4-4f7e-ab09-3f3203254c1f409ms401ms0ms3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-CEs6kUFZ.js313ms78ms5ms3rd
https://cdn.consentmanager.net/delivery/autoblocking/73879c159968.js262ms227ms17ms3rd
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMTYwNTQucl9HRFBSLmxfZW4uZF8zNzU2NC54XzE5MC52LnAudF8zNzU2NC54dF80MDc.js245ms231ms10ms3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/WidgetPaginated-B9_lMOLQ.js225ms211ms2ms3rd
https://cdn.piano.io/api/tinypass.min.js221ms153ms41ms3rd

Showing top 10 of 17 scripts

F
JS Bundles
Action
66 scripts, 764 KB unused
FIX
66 scripts, 764 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 135 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://adnz.co/header.js?adTagId=8: 115 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://nzz-assets.static-nzz.ch/production/web/14...: 107 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://nzz-assets.static-nzz.ch/production/web/14...: 101 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.piano.io/api/tinypass.min.js: 83 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 764 KB
764 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945188 KB135 KB (72%)✓3rd
https://adnz.co/header.js?adTagId=8249 KB115 KB (46%)✓3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-CEs6kUFZ.js143 KB107 KB (75%)✓3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/WidgetPaginated-B9_lMOLQ.js147 KB101 KB (69%)✓3rd
https://cdn.piano.io/api/tinypass.min.js133 KB83 KB (63%)✓3rd
https://cdn.moengage.com/release/dc_2/moe_webSdk.min.latest.js101 KB62 KB (61%)✓3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/const-I6uaA4dk.js81 KB45 KB (55%)✓3rd
https://cdn.consentmanager.net/delivery/js/cmp_final.min.js?t=2026-4-21101 KB37 KB (37%)✓3rd
https://tms.danzz.ch/scripts/t.min.js39 KB31 KB (82%)✓3rd
https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/chunk-UIGDSWPH-DYoziy-L.js41 KB25 KB (61%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
117 resources · 2.8 MB · 764 KB savings available
FIX
117 resources · 2.8 MB · 764 KB savings available
Warning::
Page weight 1.8 MB over 1MB target
Got: 2.8 MB Expected: ≤ 1 MB
Info::
~764 KB of savings available
Warning::
116 third-party resources (100% of weight)
Info::
2 resources over 200KB
117 resources · 2.8 MiB · 116 third-party 1.8 MiB over 1MB target
JavaScript 63% · 1.7 MiB
Image 15% · 440.6 KiB
Media 11% · 301.5 KiB
Document 6% · 168.9 KiB
Font 3% · 80.4 KiB
Other 1% · 38.6 KiB
CSS 1% · 35.8 KiB

~763.6 KiB of savings available

Remove unused JavaScript: 763.6 KiB
B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Info::
All images are well-optimized
19 images 440 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
3 fonts (80 KB)
PASS
3 fonts (80 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

80 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 10.9 s LCP 17.2 shttps://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/gt-america-standard--regular.woff2gt-america-standard--re... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/gt-america-standard--regular.woff2 — 17.1 KiB — 30 ms — font-display: swaphttps://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/gt-america-standard--medium.woff2gt-america-standard--me... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/gt-america-standard--medium.woff2 — 18.3 KiB — 36 ms — font-display: swaphttps://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/pensumpro-medium.woff2pensumpro-medium.woff2 https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/fonts/pensumpro-medium.woff2 — 45.1 KiB — 32 ms — font-display: swap
gt-america-standard--re... woff2 swap
Size 17 KB
Load time 30 ms
Start 378 ms
Risk FOUT — text flashes from fallback to web font
gt-america-standard--me... woff2 swap
Size 18 KB
Load time 36 ms
Start 378 ms
Risk FOUT — text flashes from fallback to web font
pensumpro-medium.woff2 woff2 swap
Size 45 KB
Load time 32 ms
Start 378 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
26 hints, 0 missing preconnects
PASS
26 hints, 0 missing preconnects
Info::
Page uses 26 resource hint(s)

Current Resource Hints

preconnect
+2
12
preload
2
dns-prefetch
+2
12
prefetch
—

26 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
117 requests over 4837ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 10.9 s LCP 17.2 shttps://nzz.ch// https://nzz.ch/ — 301 — 151 B — 70 ms — h2https://www.nzz.ch/www.nzz.ch/ https://www.nzz.ch/ — 200 — 168.4 KiB — 90 ms — h2https://img-msp-prod.nzz.ch/2026/04/21/1bed2bcf-5725-432b-96da-0ec2b1a0b4d8.jpg?width=760&height=427&fit=bounds&quality=75&auto=webp&crop=4874,2742,x528,y0img-msp-prod.nzz.ch/2026/04/21/1bed... https://img-msp-prod.nzz.ch/2026/04/21/1bed2bcf-5725-432b-96da-0ec2b1a0b4d8.jpg?width=760&height=427&fit=bounds&quality=75&auto=webp&crop=4874,2742,x528,y0 — 200 — 17.0 KiB — 92 ms — h2https://adnz.co/header.js?adTagId=8adnz.co/header.js?adTagId=8 https://adnz.co/header.js?adTagId=8 — 200 — 249.2 KiB — 167 ms — h3https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/entry.client-CD-GzIjB.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/entry.client-CD-GzIjB.js — 200 — 3.8 KiB — 117 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/chunk-UIGDSWPH-DYoziy-L.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/chunk-UIGDSWPH-DYoziy-L.js — 200 — 40.7 KiB — 145 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/index-Dz6CZgSb.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/index-Dz6CZgSb.js — 200 — 56.0 KiB — 147 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/index-B8APXGTb.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/index-B8APXGTb.js — 200 — 1.8 KiB — 117 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/root-DhueB3lc.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/root-DhueB3lc.js — 200 — 33.7 KiB — 152 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-CEs6kUFZ.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-CEs6kUFZ.js — 200 — 143.4 KiB — 160 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/useTranslation-BiRyJC4Z.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/useTranslation-BiRyJC4Z.js — 200 — 56.7 KiB — 165 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/useTailwindUtils-DzgAbQJz.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/useTailwindUtils-DzgAbQJz.js — 200 — 2.8 KiB — 112 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/const-I6uaA4dk.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/const-I6uaA4dk.js — 200 — 81.3 KiB — 169 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/JwPlayer-BrVOZO4e.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/JwPlayer-BrVOZO4e.js — 200 — 6.6 KiB — 170 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/WidgetPaginated-B9_lMOLQ.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/WidgetPaginated-B9_lMOLQ.js — 200 — 147.1 KiB — 176 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SwipeMessage-BCh9R9tz.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SwipeMessage-BCh9R9tz.js — 200 — 3.6 KiB — 175 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/Button-CgBY2__6.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/Button-CgBY2__6.js — 200 — 1.6 KiB — 175 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/swiper-react-jmk_Nkmb.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/swiper-react-jmk_Nkmb.js — 200 — 25.2 KiB — 176 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/clsx-B-dksMZM.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/clsx-B-dksMZM.js — 200 — 570 B — 116 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/Image-DnAK-JlO.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/Image-DnAK-JlO.js — 200 — 6.6 KiB — 168 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/dateFormatting--UpfdOHS.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/dateFormatting--UpfdOHS.js — 200 — 1.2 KiB — 111 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/ArticleImage-C0Et8Gul.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/ArticleImage-C0Et8Gul.js — 200 — 644 B — 167 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/_index-w7_Q1dKG.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/_index-w7_Q1dKG.js — 200 — 2.3 KiB — 167 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/root-6qi1xXUP.cssnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/root-6qi1xXUP.css — 200 — 27.4 KiB — 103 ms — h2https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-BAtjx0lP.cssnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/SectionView-BAtjx0lP.css — 200 — 605 B — 100 ms — h2https://www.nzz.ch/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.nzz.ch/cdn-cgi/scripts/5c5dd728... https://www.nzz.ch/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 814 B — 21 ms — h2https://cdn.speedcurve.com/js/lux.js?id=2410241cdn.speedcurve.com/js/lux.js?id=241... https://cdn.speedcurve.com/js/lux.js?id=2410241 — 200 — 11.3 KiB — 67 ms — h2https://cdn.consentmanager.net/delivery/cmp.min.csscdn.consentmanager.net/delivery/cmp... https://cdn.consentmanager.net/delivery/cmp.min.css — 200 — 7.8 KiB — 91 ms — h2https://cdn.cxense.com/cx.jscdn.cxense.com/cx.js https://cdn.cxense.com/cx.js — 200 — 38.1 KiB — 43 ms — http/1.1https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/pianoClient.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/pianoClient.js — 200 — 3.5 KiB — 33 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 10.9 s LCP 17.2 shttps://nzz.ch// https://nzz.ch/ — 301 — 151 B — 70 ms — h2https://www.nzz.ch/www.nzz.ch/ https://www.nzz.ch/ — 200 — 168.4 KiB — 90 ms — h2https://img-msp-prod.nzz.ch/2026/04/21/1bed2bcf-5725-432b-96da-0ec2b1a0b4d8.jpg?width=760&height=427&fit=bounds&quality=75&auto=webp&crop=4874,2742,x528,y0img-msp-prod.nzz.ch/2026/04/21/1bed... https://img-msp-prod.nzz.ch/2026/04/21/1bed2bcf-5725-432b-96da-0ec2b1a0b4d8.jpg?width=760&height=427&fit=bounds&quality=75&auto=webp&crop=4874,2742,x528,y0 — 200 — 17.0 KiB — 92 ms — h2https://adnz.co/header.js?adTagId=8adnz.co/header.js?adTagId=8 https://adnz.co/header.js?adTagId=8 — 200 — 249.2 KiB — 167 ms — h3https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/entry.client-CD-GzIjB.jsnzz-assets.static-nzz.ch/production... https://nzz-assets.static-nzz.ch/production/web/14.5.19/assets/entry.client-CD-GzIjB.js — 200 — 3.8 KiB — 117 ms — 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https://sdk-02.moengage.com/v3/campaigns/inapp/live?sdk_ver=2.73.01&unique_id=8264783f-75ab-4173-9281-9d75060d827c&os=mweb — 200 — 0 B — 33 ms — h2https://sdk-02.moengage.com/v3/campaigns/inapp/live?sdk_ver=2.73.01&unique_id=8264783f-75ab-4173-9281-9d75060d827c&os=mwebsdk-02.moengage.com/v3/campaigns/in... https://sdk-02.moengage.com/v3/campaigns/inapp/live?sdk_ver=2.73.01&unique_id=8264783f-75ab-4173-9281-9d75060d827c&os=mweb — 200 — 1.4 KiB — 43 ms — h2https://c2-eu.piano.io/xbuilder/experience/execute?aid=p8HiOl0Zpec2-eu.piano.io/xbuilder/experience/... https://c2-eu.piano.io/xbuilder/experience/execute?aid=p8HiOl0Zpe — 200 — 3.7 KiB — 87 ms — h3https://cdn.cxense.com/sp1.htmlcdn.cxense.com/sp1.html https://cdn.cxense.com/sp1.html — -1 — 0 B — 11 ms — https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 76 ms — h3https://cdn.consentmanager.net/delivery/alertdomain/d18xNjA1NC5zXzEuZF90YWdfZGVjZW50cmlxX2NvbQ.gif?ref=https%3A%2F%2Fwww.nzz.ch%2Fcdn.consentmanager.net/delivery/ale... https://cdn.consentmanager.net/delivery/alertdomain/d18xNjA1NC5zXzEuZF90YWdfZGVjZW50cmlxX2NvbQ.gif?ref=https%3A%2F%2Fwww.nzz.ch%2F — 200 — 450 B — 18 ms — h2https://tag.decentriq.com/onelog/dqtag.min.jstag.decentriq.com/onelog/dqtag.min.... https://tag.decentriq.com/onelog/dqtag.min.js — 200 — 5.8 KiB — 201 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 6612ms · 1500KB · CHF104/mo
nzz-assets.static-nzz.ch
Other
Costly
Execution 2059ms
Transfer 56 KB
Monthly Cost CHF33/mo
Unattributable
Other
Costly
Execution 779ms
Transfer 0 KB
Monthly Cost CHF12/mo
www.nzz.ch
Other
Costly
Execution 753ms
Transfer 168 KB
Monthly Cost CHF12/mo
adnz.co
Other
Costly
Execution 454ms
Transfer 249 KB
Unused 46%
Monthly Cost CHF7/mo
www.nzz.ch
Other
Costly
Execution 409ms
Transfer 0 KB
Monthly Cost CHF6/mo
nzz-assets.static-nzz.ch
Other
Costly
Execution 313ms
Transfer 143 KB
Unused 75%
Monthly Cost CHF5/mo
cdn.consentmanager.net
Other
Costly
Execution 262ms
Transfer 36 KB
Monthly Cost CHF4/mo
cdn.consentmanager.net
Other
Costly
Execution 245ms
Transfer 23 KB
Monthly Cost CHF4/mo
nzz-assets.static-nzz.ch
Other
Costly
Execution 225ms
Transfer 147 KB
Unused 69%
Monthly Cost CHF4/mo
cdn.piano.io
Other
Costly
Execution 221ms
Transfer 133 KB
Unused 63%
Monthly Cost CHF3/mo
cdn.moengage.com
Other
Costly
Execution 217ms
Transfer 101 KB
Unused 61%
Monthly Cost CHF3/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 201ms
Transfer 188 KB
Unused 72%
Monthly Cost CHF3/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 126ms
Transfer 34 KB
Monthly Cost CHF2/mo
nzz-assets.static-nzz.ch
Other
Optional
Execution 94ms
Transfer 57 KB
Monthly Cost CHF1/mo
cdn.cxense.com
Other
Optional
Execution 92ms
Transfer 38 KB
Monthly Cost CHF1/mo
cdn.consentmanager.net
Other
Optional
Execution 87ms
Transfer 101 KB
Unused 37%
Monthly Cost CHF1/mo
nzz-assets.static-nzz.ch
Other
Optional
Execution 75ms
Transfer 25 KB
Monthly Cost CHF1/mo

These scripts may cost more than they're worth

  • nzz-assets.static-nzz.ch adds 2059ms and costs ~CHF33/month
  • Unattributable adds 779ms and costs ~CHF12/month
  • www.nzz.ch adds 753ms and costs ~CHF12/month
  • adnz.co adds 454ms and costs ~CHF7/month
  • www.nzz.ch adds 409ms and costs ~CHF6/month
  • nzz-assets.static-nzz.ch adds 313ms and costs ~CHF5/month
  • cdn.consentmanager.net adds 262ms and costs ~CHF4/month
  • cdn.consentmanager.net adds 245ms and costs ~CHF4/month
  • nzz-assets.static-nzz.ch adds 225ms and costs ~CHF4/month
  • cdn.piano.io adds 221ms and costs ~CHF3/month
  • cdn.moengage.com adds 217ms and costs ~CHF3/month
  • securepubads.g.doubleclick.net adds 201ms and costs ~CHF3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

nzz-assets.static-nzz.ch takes 2059ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 779ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.nzz.ch takes 753ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

adnz.co takes 454ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.nzz.ch takes 409ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

nzz-assets.static-nzz.ch takes 313ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

75% of nzz-assets.static-nzz.ch's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

cdn.consentmanager.net takes 262ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.consentmanager.net takes 245ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

nzz-assets.static-nzz.ch takes 225ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

69% of nzz-assets.static-nzz.ch's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

cdn.piano.io takes 221ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

63% of cdn.piano.io's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

cdn.moengage.com takes 217ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

61% of cdn.moengage.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

securepubads.g.doubleclick.net takes 201ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

72% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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